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        <p>###NSString+Hash.h<br><a id="more"></a></p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br><span class="line">67</span><br><span class="line">68</span><br><span class="line">69</span><br><span class="line">70</span><br><span class="line">71</span><br><span class="line">72</span><br><span class="line">73</span><br><span class="line">74</span><br><span class="line">75</span><br><span class="line">76</span><br><span class="line">77</span><br><span class="line">78</span><br><span class="line">79</span><br><span class="line">80</span><br><span class="line">81</span><br><span class="line">82</span><br><span class="line">83</span><br><span class="line">84</span><br><span class="line">85</span><br><span class="line">86</span><br><span class="line">87</span><br><span class="line">88</span><br><span class="line">89</span><br><span class="line">90</span><br><span class="line">91</span><br><span class="line">92</span><br><span class="line">93</span><br><span class="line">94</span><br><span class="line">95</span><br><span class="line">96</span><br><span class="line">97</span><br><span class="line">98</span><br><span class="line">99</span><br><span class="line">100</span><br><span class="line">101</span><br><span class="line">102</span><br><span class="line">103</span><br><span class="line">104</span><br><span class="line">105</span><br><span class="line">106</span><br><span class="line">107</span><br><span class="line">108</span><br><span class="line">109</span><br><span class="line">110</span><br><span class="line">111</span><br><span class="line">112</span><br><span class="line">113</span><br><span class="line">114</span><br><span class="line">115</span><br><span class="line">116</span><br><span class="line">117</span><br><span class="line">118</span><br><span class="line">119</span><br><span class="line">120</span><br><span class="line">121</span><br><span class="line">122</span><br><span class="line">123</span><br><span class="line">124</span><br><span class="line">125</span><br><span class="line">126</span><br><span class="line">127</span><br><span class="line">128</span><br><span class="line">129</span><br><span class="line">130</span><br><span class="line">131</span><br><span class="line">132</span><br><span class="line">133</span><br><span class="line">134</span><br><span class="line">135</span><br><span class="line">136</span><br><span class="line">137</span><br><span class="line">138</span><br><span class="line">139</span><br><span class="line">140</span><br><span class="line">141</span><br><span class="line">142</span><br><span class="line">143</span><br><span class="line">144</span><br><span class="line">145</span><br><span class="line">146</span><br><span class="line">147</span><br><span class="line">148</span><br><span class="line">149</span><br><span class="line">150</span><br><span class="line">151</span><br><span class="line">152</span><br><span class="line">153</span><br><span class="line">154</span><br><span class="line">155</span><br><span class="line">156</span><br><span class="line">157</span><br></pre></td><td class="code"><pre><span class="line"></span><br><span class="line"></span><br><span class="line">#import &lt;Foundation/Foundation.h&gt;</span><br><span class="line"></span><br><span class="line">@interface NSString (Hash)</span><br><span class="line"></span><br><span class="line">#pragma mark - 散列函数</span><br><span class="line">/**</span><br><span class="line"> *  计算MD5散列结果</span><br><span class="line"> *</span><br><span class="line"> *  终端测试命令：</span><br><span class="line"> *  @code</span><br><span class="line"> *  md5 -s &quot;string&quot;</span><br><span class="line"> *  @endcode</span><br><span class="line"> *</span><br><span class="line"> *  &lt;p&gt;提示：随着 MD5 碰撞生成器的出现，MD5 算法不应被用于任何软件完整性检查或代码签名的用途。&lt;p&gt;</span><br><span class="line"> *</span><br><span class="line"> *  @return 32个字符的MD5散列字符串</span><br><span class="line"> */</span><br><span class="line">- (NSString *)md5String;</span><br><span class="line"></span><br><span class="line">/**</span><br><span class="line"> *  计算SHA1散列结果</span><br><span class="line"> *</span><br><span class="line"> *  终端测试命令：</span><br><span class="line"> *  @code</span><br><span class="line"> *  echo -n &quot;string&quot; | openssl sha -sha1</span><br><span class="line"> *  @endcode</span><br><span class="line"> *</span><br><span class="line"> *  @return 40个字符的SHA1散列字符串</span><br><span class="line"> */</span><br><span class="line">- (NSString *)sha1String;</span><br><span class="line"></span><br><span class="line">/**</span><br><span class="line"> *  计算SHA256散列结果</span><br><span class="line"> *</span><br><span class="line"> *  终端测试命令：</span><br><span class="line"> *  @code</span><br><span class="line"> *  echo -n &quot;string&quot; | openssl sha -sha256</span><br><span class="line"> *  @endcode</span><br><span class="line"> *</span><br><span class="line"> *  @return 64个字符的SHA256散列字符串</span><br><span class="line"> */</span><br><span class="line">- (NSString *)sha256String;</span><br><span class="line"></span><br><span class="line">/**</span><br><span class="line"> *  计算SHA 512散列结果</span><br><span class="line"> *</span><br><span class="line"> *  终端测试命令：</span><br><span class="line"> *  @code</span><br><span class="line"> *  echo -n &quot;string&quot; | openssl sha -sha512</span><br><span class="line"> *  @endcode</span><br><span class="line"> *</span><br><span class="line"> *  @return 128个字符的SHA 512散列字符串</span><br><span class="line"> */</span><br><span class="line">- (NSString *)sha512String;</span><br><span class="line"></span><br><span class="line">#pragma mark - HMAC 散列函数</span><br><span class="line">/**</span><br><span class="line"> *  计算HMAC MD5散列结果</span><br><span class="line"> *</span><br><span class="line"> *  终端测试命令：</span><br><span class="line"> *  @code</span><br><span class="line"> *  echo -n &quot;string&quot; | openssl dgst -md5 -hmac &quot;key&quot;</span><br><span class="line"> *  @endcode</span><br><span class="line"> *</span><br><span class="line"> *  @return 32个字符的HMAC MD5散列字符串</span><br><span class="line"> */</span><br><span class="line">- (NSString *)hmacMD5StringWithKey:(NSString *)key;</span><br><span class="line"></span><br><span class="line">/**</span><br><span class="line"> *  计算HMAC SHA1散列结果</span><br><span class="line"> *</span><br><span class="line"> *  终端测试命令：</span><br><span class="line"> *  @code</span><br><span class="line"> *  echo -n &quot;string&quot; | openssl sha -sha1 -hmac &quot;key&quot;</span><br><span class="line"> *  @endcode</span><br><span class="line"> *</span><br><span class="line"> *  @return 40个字符的HMAC SHA1散列字符串</span><br><span class="line"> */</span><br><span class="line">- (NSString *)hmacSHA1StringWithKey:(NSString *)key;</span><br><span class="line"></span><br><span class="line">/**</span><br><span class="line"> *  计算HMAC SHA256散列结果</span><br><span class="line"> *</span><br><span class="line"> *  终端测试命令：</span><br><span class="line"> *  @code</span><br><span class="line"> *  echo -n &quot;string&quot; | openssl sha -sha256 -hmac &quot;key&quot;</span><br><span class="line"> *  @endcode</span><br><span class="line"> *</span><br><span class="line"> *  @return 64个字符的HMAC SHA256散列字符串</span><br><span class="line"> */</span><br><span class="line">- (NSString *)hmacSHA256StringWithKey:(NSString *)key;</span><br><span class="line"></span><br><span class="line">/**</span><br><span class="line"> *  计算HMAC SHA512散列结果</span><br><span class="line"> *</span><br><span class="line"> *  终端测试命令：</span><br><span class="line"> *  @code</span><br><span class="line"> *  echo -n &quot;string&quot; | openssl sha -sha512 -hmac &quot;key&quot;</span><br><span class="line"> *  @endcode</span><br><span class="line"> *</span><br><span class="line"> *  @return 128个字符的HMAC SHA512散列字符串</span><br><span class="line"> */</span><br><span class="line">- (NSString *)hmacSHA512StringWithKey:(NSString *)key;</span><br><span class="line"></span><br><span class="line">#pragma mark - 文件散列函数</span><br><span class="line"></span><br><span class="line">/**</span><br><span class="line"> *  计算文件的MD5散列结果</span><br><span class="line"> *</span><br><span class="line"> *  终端测试命令：</span><br><span class="line"> *  @code</span><br><span class="line"> *  md5 file.dat</span><br><span class="line"> *  @endcode</span><br><span class="line"> *</span><br><span class="line"> *  @return 32个字符的MD5散列字符串</span><br><span class="line"> */</span><br><span class="line">- (NSString *)fileMD5Hash;</span><br><span class="line"></span><br><span class="line">/**</span><br><span class="line"> *  计算文件的SHA1散列结果</span><br><span class="line"> *</span><br><span class="line"> *  终端测试命令：</span><br><span class="line"> *  @code</span><br><span class="line"> *  openssl sha -sha1 file.dat</span><br><span class="line"> *  @endcode</span><br><span class="line"> *</span><br><span class="line"> *  @return 40个字符的SHA1散列字符串</span><br><span class="line"> */</span><br><span class="line">- (NSString *)fileSHA1Hash;</span><br><span class="line"></span><br><span class="line">/**</span><br><span class="line"> *  计算文件的SHA256散列结果</span><br><span class="line"> *</span><br><span class="line"> *  终端测试命令：</span><br><span class="line"> *  @code</span><br><span class="line"> *  openssl sha -sha256 file.dat</span><br><span class="line"> *  @endcode</span><br><span class="line"> *</span><br><span class="line"> *  @return 64个字符的SHA256散列字符串</span><br><span class="line"> */</span><br><span class="line">- (NSString *)fileSHA256Hash;</span><br><span class="line"></span><br><span class="line">/**</span><br><span class="line"> *  计算文件的SHA512散列结果</span><br><span class="line"> *</span><br><span class="line"> *  终端测试命令：</span><br><span class="line"> *  @code</span><br><span class="line"> *  openssl sha -sha512 file.dat</span><br><span class="line"> *  @endcode</span><br><span class="line"> *</span><br><span class="line"> *  @return 128个字符的SHA512散列字符串</span><br><span class="line"> */</span><br><span class="line">- (NSString *)fileSHA512Hash;</span><br><span class="line"></span><br><span class="line">@end</span><br></pre></td></tr></table></figure>
<p>###NSString+Hash.m<br><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span 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class="line">181</span><br><span class="line">182</span><br><span class="line">183</span><br><span class="line">184</span><br><span class="line">185</span><br><span class="line">186</span><br><span class="line">187</span><br><span class="line">188</span><br><span class="line">189</span><br><span class="line">190</span><br><span class="line">191</span><br><span class="line">192</span><br><span class="line">193</span><br><span class="line">194</span><br><span class="line">195</span><br><span class="line">196</span><br><span class="line">197</span><br><span class="line">198</span><br><span class="line">199</span><br><span class="line">200</span><br><span class="line">201</span><br><span class="line">202</span><br><span class="line">203</span><br><span class="line">204</span><br><span class="line">205</span><br><span class="line">206</span><br><span class="line">207</span><br><span class="line">208</span><br><span class="line">209</span><br><span class="line">210</span><br><span class="line">211</span><br><span class="line">212</span><br><span class="line">213</span><br><span class="line">214</span><br><span class="line">215</span><br><span class="line">216</span><br><span class="line">217</span><br><span class="line">218</span><br><span class="line">219</span><br><span class="line">220</span><br></pre></td><td class="code"><pre><span class="line"></span><br><span class="line">#import &quot;NSString+Hash.h&quot;</span><br><span class="line">#import &lt;CommonCrypto/CommonCrypto.h&gt;</span><br><span class="line"></span><br><span class="line">@implementation NSString (Hash)</span><br><span class="line"></span><br><span class="line">#pragma mark - 散列函数</span><br><span class="line">- (NSString *)md5String &#123;</span><br><span class="line">    const char *str = self.UTF8String;</span><br><span class="line">    uint8_t buffer[CC_MD5_DIGEST_LENGTH];</span><br><span class="line">    </span><br><span class="line">    CC_MD5(str, (CC_LONG)strlen(str), buffer);</span><br><span class="line">    </span><br><span class="line">    return [self stringFromBytes:buffer length:CC_MD5_DIGEST_LENGTH];</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line">- (NSString *)sha1String &#123;</span><br><span class="line">    const char *str = self.UTF8String;</span><br><span class="line">    uint8_t buffer[CC_SHA1_DIGEST_LENGTH];</span><br><span class="line">    </span><br><span class="line">    CC_SHA1(str, (CC_LONG)strlen(str), buffer);</span><br><span class="line">    </span><br><span class="line">    return [self stringFromBytes:buffer length:CC_SHA1_DIGEST_LENGTH];</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line">- (NSString *)sha256String &#123;</span><br><span class="line">    const char *str = self.UTF8String;</span><br><span class="line">    uint8_t buffer[CC_SHA256_DIGEST_LENGTH];</span><br><span class="line">    </span><br><span class="line">    CC_SHA256(str, (CC_LONG)strlen(str), buffer);</span><br><span class="line">    </span><br><span class="line">    return [self stringFromBytes:buffer length:CC_SHA256_DIGEST_LENGTH];</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line">- (NSString *)sha512String &#123;</span><br><span class="line">    const char *str = self.UTF8String;</span><br><span class="line">    uint8_t buffer[CC_SHA512_DIGEST_LENGTH];</span><br><span class="line">    </span><br><span class="line">    CC_SHA512(str, (CC_LONG)strlen(str), buffer);</span><br><span class="line">    </span><br><span class="line">    return [self stringFromBytes:buffer length:CC_SHA512_DIGEST_LENGTH];</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line">#pragma mark - HMAC 散列函数</span><br><span class="line">- (NSString *)hmacMD5StringWithKey:(NSString *)key &#123;</span><br><span class="line">    const char *keyData = key.UTF8String;</span><br><span class="line">    const char *strData = self.UTF8String;</span><br><span class="line">    uint8_t buffer[CC_MD5_DIGEST_LENGTH];</span><br><span class="line">    </span><br><span class="line">    CCHmac(kCCHmacAlgMD5, keyData, strlen(keyData), strData, strlen(strData), buffer);</span><br><span class="line">    </span><br><span class="line">    return [self stringFromBytes:buffer length:CC_MD5_DIGEST_LENGTH];</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line">- (NSString *)hmacSHA1StringWithKey:(NSString *)key &#123;</span><br><span class="line">    const char *keyData = key.UTF8String;</span><br><span class="line">    const char *strData = self.UTF8String;</span><br><span class="line">    uint8_t buffer[CC_SHA1_DIGEST_LENGTH];</span><br><span class="line">    </span><br><span class="line">    CCHmac(kCCHmacAlgSHA1, keyData, strlen(keyData), strData, strlen(strData), buffer);</span><br><span class="line">    </span><br><span class="line">    return [self stringFromBytes:buffer length:CC_SHA1_DIGEST_LENGTH];</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line">- (NSString *)hmacSHA256StringWithKey:(NSString *)key &#123;</span><br><span class="line">    const char *keyData = key.UTF8String;</span><br><span class="line">    const char *strData = self.UTF8String;</span><br><span class="line">    uint8_t buffer[CC_SHA256_DIGEST_LENGTH];</span><br><span class="line">    </span><br><span class="line">    CCHmac(kCCHmacAlgSHA256, keyData, strlen(keyData), strData, strlen(strData), buffer);</span><br><span class="line">    </span><br><span class="line">    return [self stringFromBytes:buffer length:CC_SHA256_DIGEST_LENGTH];</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line">- (NSString *)hmacSHA512StringWithKey:(NSString *)key &#123;</span><br><span class="line">    const char *keyData = key.UTF8String;</span><br><span class="line">    const char *strData = self.UTF8String;</span><br><span class="line">    uint8_t buffer[CC_SHA512_DIGEST_LENGTH];</span><br><span class="line">    </span><br><span class="line">    CCHmac(kCCHmacAlgSHA512, keyData, strlen(keyData), strData, strlen(strData), buffer);</span><br><span class="line">    </span><br><span class="line">    return [self stringFromBytes:buffer length:CC_SHA512_DIGEST_LENGTH];</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line">#pragma mark - 文件散列函数</span><br><span class="line"></span><br><span class="line">#define FileHashDefaultChunkSizeForReadingData 4096</span><br><span class="line"></span><br><span class="line">- (NSString *)fileMD5Hash &#123;</span><br><span class="line">    NSFileHandle *fp = [NSFileHandle fileHandleForReadingAtPath:self];</span><br><span class="line">    if (fp == nil) &#123;</span><br><span class="line">        return nil;</span><br><span class="line">    &#125;</span><br><span class="line">    </span><br><span class="line">    CC_MD5_CTX hashCtx;</span><br><span class="line">    CC_MD5_Init(&amp;hashCtx);</span><br><span class="line">    </span><br><span class="line">    while (YES) &#123;</span><br><span class="line">        @autoreleasepool &#123;</span><br><span class="line">            NSData *data = [fp readDataOfLength:FileHashDefaultChunkSizeForReadingData];</span><br><span class="line">            </span><br><span class="line">            CC_MD5_Update(&amp;hashCtx, data.bytes, (CC_LONG)data.length);</span><br><span class="line">            </span><br><span class="line">            if (data.length == 0) &#123;</span><br><span class="line">                break;</span><br><span class="line">            &#125;</span><br><span class="line">        &#125;</span><br><span class="line">    &#125;</span><br><span class="line">    [fp closeFile];</span><br><span class="line">    </span><br><span class="line">    uint8_t buffer[CC_MD5_DIGEST_LENGTH];</span><br><span class="line">    CC_MD5_Final(buffer, &amp;hashCtx);</span><br><span class="line">    </span><br><span class="line">    return [self stringFromBytes:buffer length:CC_MD5_DIGEST_LENGTH];</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line">- (NSString *)fileSHA1Hash &#123;</span><br><span class="line">    NSFileHandle *fp = [NSFileHandle fileHandleForReadingAtPath:self];</span><br><span class="line">    if (fp == nil) &#123;</span><br><span class="line">        return nil;</span><br><span class="line">    &#125;</span><br><span class="line">    </span><br><span class="line">    CC_SHA1_CTX hashCtx;</span><br><span class="line">    CC_SHA1_Init(&amp;hashCtx);</span><br><span class="line">    </span><br><span class="line">    while (YES) &#123;</span><br><span class="line">        @autoreleasepool &#123;</span><br><span class="line">            NSData *data = [fp readDataOfLength:FileHashDefaultChunkSizeForReadingData];</span><br><span class="line">            </span><br><span class="line">            CC_SHA1_Update(&amp;hashCtx, data.bytes, (CC_LONG)data.length);</span><br><span class="line">            </span><br><span class="line">            if (data.length == 0) &#123;</span><br><span class="line">                break;</span><br><span class="line">            &#125;</span><br><span class="line">        &#125;</span><br><span class="line">    &#125;</span><br><span class="line">    [fp closeFile];</span><br><span class="line">    </span><br><span class="line">    uint8_t buffer[CC_SHA1_DIGEST_LENGTH];</span><br><span class="line">    CC_SHA1_Final(buffer, &amp;hashCtx);</span><br><span class="line">    </span><br><span class="line">    return [self stringFromBytes:buffer length:CC_SHA1_DIGEST_LENGTH];</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line">- (NSString *)fileSHA256Hash &#123;</span><br><span class="line">    NSFileHandle *fp = [NSFileHandle fileHandleForReadingAtPath:self];</span><br><span class="line">    if (fp == nil) &#123;</span><br><span class="line">        return nil;</span><br><span class="line">    &#125;</span><br><span class="line">    </span><br><span class="line">    CC_SHA256_CTX hashCtx;</span><br><span class="line">    CC_SHA256_Init(&amp;hashCtx);</span><br><span class="line">    </span><br><span class="line">    while (YES) &#123;</span><br><span class="line">        @autoreleasepool &#123;</span><br><span class="line">            NSData *data = [fp readDataOfLength:FileHashDefaultChunkSizeForReadingData];</span><br><span class="line">            </span><br><span class="line">            CC_SHA256_Update(&amp;hashCtx, data.bytes, (CC_LONG)data.length);</span><br><span class="line">            </span><br><span class="line">            if (data.length == 0) &#123;</span><br><span class="line">                break;</span><br><span class="line">            &#125;</span><br><span class="line">        &#125;</span><br><span class="line">    &#125;</span><br><span class="line">    [fp closeFile];</span><br><span class="line">    </span><br><span class="line">    uint8_t buffer[CC_SHA256_DIGEST_LENGTH];</span><br><span class="line">    CC_SHA256_Final(buffer, &amp;hashCtx);</span><br><span class="line">    </span><br><span class="line">    return [self stringFromBytes:buffer length:CC_SHA256_DIGEST_LENGTH];</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line">- (NSString *)fileSHA512Hash &#123;</span><br><span class="line">    NSFileHandle *fp = [NSFileHandle fileHandleForReadingAtPath:self];</span><br><span class="line">    if (fp == nil) &#123;</span><br><span class="line">        return nil;</span><br><span class="line">    &#125;</span><br><span class="line">    </span><br><span class="line">    CC_SHA512_CTX hashCtx;</span><br><span class="line">    CC_SHA512_Init(&amp;hashCtx);</span><br><span class="line">    </span><br><span class="line">    while (YES) &#123;</span><br><span class="line">        @autoreleasepool &#123;</span><br><span class="line">            NSData *data = [fp readDataOfLength:FileHashDefaultChunkSizeForReadingData];</span><br><span class="line">            </span><br><span class="line">            CC_SHA512_Update(&amp;hashCtx, data.bytes, (CC_LONG)data.length);</span><br><span class="line">            </span><br><span class="line">            if (data.length == 0) &#123;</span><br><span class="line">                break;</span><br><span class="line">            &#125;</span><br><span class="line">        &#125;</span><br><span class="line">    &#125;</span><br><span class="line">    [fp closeFile];</span><br><span class="line">    </span><br><span class="line">    uint8_t buffer[CC_SHA512_DIGEST_LENGTH];</span><br><span class="line">    CC_SHA512_Final(buffer, &amp;hashCtx);</span><br><span class="line">    </span><br><span class="line">    return [self stringFromBytes:buffer length:CC_SHA512_DIGEST_LENGTH];</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line">#pragma mark - 助手方法</span><br><span class="line">/**</span><br><span class="line"> *  返回二进制 Bytes 流的字符串表示形式</span><br><span class="line"> *</span><br><span class="line"> *  @param bytes  二进制 Bytes 数组</span><br><span class="line"> *  @param length 数组长度</span><br><span class="line"> *</span><br><span class="line"> *  @return 字符串表示形式</span><br><span class="line"> */</span><br><span class="line">- (NSString *)stringFromBytes:(uint8_t *)bytes length:(int)length &#123;</span><br><span class="line">    NSMutableString *strM = [NSMutableString string];</span><br><span class="line">    </span><br><span class="line">    for (int i = 0; i &lt; length; i++) &#123;</span><br><span class="line">        [strM appendFormat:@&quot;%02x&quot;, bytes[i]];</span><br><span class="line">    &#125;</span><br><span class="line">    </span><br><span class="line">    return [strM copy];</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line">@end</span><br></pre></td></tr></table></figure></p>

      
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